Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures

Zhu, Tong; Yuan, Long; Zhao, Yan; Zhou, Mingwei; Wan, Yan; Mei, Jianguo; Huang, Libai

doi:10.1126/sciadv.aao3104

Title: Highly mobile charge-transfer excitons in two-dimensional WS₂/tetracene heterostructures

Abstract

Charge-transfer (CT) excitons at heterointerfaces play a critical role in light to electricity conversion using organic and nanostructured materials. However, how CT excitons migrate at these interfaces is poorly understood. We investigate the formation and transport of CT excitons in two-dimensional WS₂/tetracene van der Waals heterostructures. Electron and hole transfer occurs on the time scale of a few picoseconds, and emission of interlayer CT excitons with a binding energy of ~0.3 eV has been observed. Transport of the CT excitons is directly measured by transient absorption microscopy, revealing coexistence of delocalized and localized states. Trapping-detrapping dynamics between the delocalized and localized states leads to stretched-exponential photoluminescence decay with an average lifetime of ~2 ns. The delocalized CT excitons are remarkably mobile with a diffusion constant of ~1 cm² s^-1. These highly mobile CT excitons could have important implications in achieving efficient charge separation.

Authors:

^[1];

^[1]; Zhao, Yan ^[1];

^[1];

^[1]

Purdue Univ., West Lafayette, IN (United States)

Publication Date:: Fri Jan 12 00:00:00 EST 2018

Research Org.:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1499924

Grant/Contract Number:: SC0016356

Resource Type:: Accepted Manuscript

Journal Name:: Science Advances

Additional Journal Information:: Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2375-2548

Publisher:: AAAS

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Zhu, Tong, Yuan, Long, Zhao, Yan, Zhou, Mingwei, Wan, Yan, Mei, Jianguo, and Huang, Libai. Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures.  United States: N. p., 2018. 
Web.  doi:10.1126/sciadv.aao3104.

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                    Zhu, Tong, Yuan, Long, Zhao, Yan, Zhou, Mingwei, Wan, Yan, Mei, Jianguo, & Huang, Libai. Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures.  United States.  https://doi.org/10.1126/sciadv.aao3104

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                    Zhu, Tong, Yuan, Long, Zhao, Yan, Zhou, Mingwei, Wan, Yan, Mei, Jianguo, and Huang, Libai. Fri .  
"Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures".  United States.  https://doi.org/10.1126/sciadv.aao3104.  https://www.osti.gov/servlets/purl/1499924.

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@article{osti_1499924,

  title        = {Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures},

  author       = {Zhu, Tong and Yuan, Long and Zhao, Yan and Zhou, Mingwei and Wan, Yan and Mei, Jianguo and Huang, Libai},

  abstractNote = {Charge-transfer (CT) excitons at heterointerfaces play a critical role in light to electricity conversion using organic and nanostructured materials. However, how CT excitons migrate at these interfaces is poorly understood. We investigate the formation and transport of CT excitons in two-dimensional WS2/tetracene van der Waals heterostructures. Electron and hole transfer occurs on the time scale of a few picoseconds, and emission of interlayer CT excitons with a binding energy of ~0.3 eV has been observed. Transport of the CT excitons is directly measured by transient absorption microscopy, revealing coexistence of delocalized and localized states. Trapping-detrapping dynamics between the delocalized and localized states leads to stretched-exponential photoluminescence decay with an average lifetime of ~2 ns. The delocalized CT excitons are remarkably mobile with a diffusion constant of ~1 cm2 s-1. These highly mobile CT excitons could have important implications in achieving efficient charge separation.},

  doi          = {10.1126/sciadv.aao3104},

  journal      = {Science Advances},

  number       = 1,

  volume       = 4,

  place        = {United States},

  year         = {Fri Jan 12 00:00:00 EST 2018},

  month        = {Fri Jan 12 00:00:00 EST 2018}

}

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Fig. 1.: Construction of a 1L-WS₂/Tc heterostructure. (A) Optical image of WS₂ flakes exfoliated on a Si/SiO₂ substrate. The 1L-WS₂ is indicated by the dashed line. The square shows the area imaged by AFM in (B). Scale bar, 10 mm. (B) AFM image of the same 1L-WS₂ flake in (A)more »

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Title: Highly mobile charge-transfer excitons in two-dimensional WS2/tetracene heterostructures

Abstract

Citation Formats

Figures / Tables:

Charge Transfer Excitons at van der Waals Interfaces journal, June 2015

A Model of Charge-Transfer Excitons: Diffusion, Spin Dynamics, and Magnetic Field Effects journal, May 2016

Visualizing excitations at buried heterojunctions in organic semiconductor blends journal, February 2017

Mixed-dimensional van der Waals heterostructures journal, August 2016

Vertical field-effect transistor based on graphene–WS2 heterostructures for flexible and transparent electronics journal, December 2012

Nonradiative Resonant Excitation Transfer from Nanocrystal Quantum Dots to Adjacent Quantum Channels journal, November 2007

Drift mobility of holes in crystalline tetracene journal, October 1976

Probing charge transfer excitons in a MoSe 2 –WS 2 van der Waals heterostructure journal, January 2015

Reduced Dielectric Screening and Enhanced Energy Transfer in Single- and Few-Layer MoS 2 journal, October 2014

Nanoscale transport of charge-transfer states in organic donor–acceptor blends journal, September 2015

Hybrid, Gate-Tunable, van der Waals p–n Heterojunctions from Pentacene and MoS 2 journal, December 2015

Separation of geminate charge-pairs at donor–acceptor interfaces in disordered solids journal, November 2004

Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides journal, April 2013

Single-crystal growth, structures, charge transfer and transport properties of anthracene-F 4 TCNQ and tetracene-F 4 TCNQ charge-transfer compounds journal, January 2017

Strong interlayer coupling in van der Waals heterostructures built from single-layer chalcogenides journal, April 2014

Probing Evolution of Twist-Angle-Dependent Interlayer Excitons in MoSe 2 /WSe 2 van der Waals Heterostructures journal, April 2017

Cooperative singlet and triplet exciton transport in tetracene crystals visualized by ultrafast microscopy journal, September 2015

Van der Waals heterostructures journal, July 2013

Ultrafast Exciton Dissociation and Long-Lived Charge Separation in a Photovoltaic Pentacene–MoS 2 van der Waals Heterojunction journal, December 2016

Energy Transfer from Quantum Dots to Graphene and MoS 2 : The Role of Absorption and Screening in Two-Dimensional Materials journal, March 2016

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Picosecond energy transfer and multiexciton transfer outpaces Auger recombination in binary CdSe nanoplatelet solids journal, March 2015

Epitaxial Growth of Molecular Crystals on van der Waals Substrates for High-Performance Organic Electronics journal, January 2014

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Field-Effect Tunneling Transistor Based on Vertical Graphene Heterostructures journal, February 2012

Nonradiative Energy Transfer from Individual CdSe/ZnS Quantum Dots to Single-Layer and Few-Layer Tin Disulfide journal, April 2016

Electrical Transport Properties of Single-Layer WS 2 journal, July 2014

Interfacial Charge Transfer Circumventing Momentum Mismatch at Two-Dimensional van der Waals Heterojunctions journal, May 2017

Near-unity photoluminescence quantum yield in MoS2 journal, November 2015

Evolution of Electronic Structure in Atomically Thin Sheets of WS 2 and WSe 2 journal, December 2012

Highly efficient gate-tunable photocurrent generation in vertical heterostructures of layered materials journal, October 2013

Stretched-exponential decay of the luminescence in porous silicon journal, December 1993

Exciton dynamics and annihilation in WS 2 2D semiconductors journal, January 2015

Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer WS 2 journal, August 2014

Coherent ultrafast charge transfer in an organic photovoltaic blend journal, May 2014

Determination of band offsets, hybridization, and exciton binding in 2D semiconductor heterostructures journal, February 2017

Interlayer orientation-dependent light absorption and emission in monolayer semiconductor stacks journal, June 2015

Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures journal, February 2015

Coherent ultrafast charge transfer in an organic photovoltaic blend conference, January 2014

Visualizing excitations at buried heterojunctions in organic semiconductor blends text, January 2017

Evolution of Electronic Structure in Atomically Thin Sheets of WS2 and WSe2 text, January 2012

Reduced dielectric screening and enhanced energy transfer in single and few-layer MoS2 text, January 2014

Electrical Transport Properties of Single-Layer WS2 text, January 2014

Twist-controlled resonant tunnelling in graphene-boron nitride-graphene heterostructures text, January 2014

Mixed-Dimensional van der Waals Heterostructures text, January 2016

Synthesis of Sulfur-Hybridized Pyracylene and the Unexpected Phenyl Shift Mediated Rearrangement of Scholl Reaction: Synthesis of Sulfur-Hybridized Pyracylene and the Unexpected Phenyl Shift Mediated Rearrangement of Scholl Reaction journal, May 2019

A Facile and Effective Method for Patching Sulfur Vacancies of WS 2 via Nitrogen Plasma Treatment journal, June 2019

Long-range exciton transport and slow annihilation in two-dimensional hybrid perovskites journal, January 2020

Molecular engineering of organic–inorganic hybrid perovskites quantum wells journal, November 2019

Transient absorption microscopy: Technological innovations and applications in materials science and life science journal, January 2020

Long-lived charge separation in two-dimensional ligand-perovskite heterostructures journal, January 2020

Ultrafast measurements of the dynamics of single nanostructures: a review journal, November 2018

Biexciton Auger Recombination Differs in Hybrid and Inorganic Halide Perovskite Quantum Dots journal, December 2017

Title: Highly mobile charge-transfer excitons in two-dimensional WS₂/tetracene heterostructures

Charge Transfer Excitons at van der Waals Interfaces
journal, June 2015

A Model of Charge-Transfer Excitons: Diffusion, Spin Dynamics, and Magnetic Field Effects
journal, May 2016

Visualizing excitations at buried heterojunctions in organic semiconductor blends
journal, February 2017

Mixed-dimensional van der Waals heterostructures
journal, August 2016

Vertical field-effect transistor based on graphene–WS2 heterostructures for flexible and transparent electronics
journal, December 2012

Nonradiative Resonant Excitation Transfer from Nanocrystal Quantum Dots to Adjacent Quantum Channels
journal, November 2007

Drift mobility of holes in crystalline tetracene
journal, October 1976

Probing charge transfer excitons in a MoSe ₂ –WS ₂ van der Waals heterostructure
journal, January 2015

Reduced Dielectric Screening and Enhanced Energy Transfer in Single- and Few-Layer MoS ₂
journal, October 2014

Nanoscale transport of charge-transfer states in organic donor–acceptor blends
journal, September 2015

Hybrid, Gate-Tunable, van der Waals p–n Heterojunctions from Pentacene and MoS ₂
journal, December 2015

Separation of geminate charge-pairs at donor–acceptor interfaces in disordered solids
journal, November 2004

Optical signature of symmetry variations and spin-valley coupling in atomically thin tungsten dichalcogenides
journal, April 2013

Single-crystal growth, structures, charge transfer and transport properties of anthracene-F ₄ TCNQ and tetracene-F ₄ TCNQ charge-transfer compounds
journal, January 2017

Strong interlayer coupling in van der Waals heterostructures built from single-layer chalcogenides
journal, April 2014

Probing Evolution of Twist-Angle-Dependent Interlayer Excitons in MoSe ₂ /WSe ₂ van der Waals Heterostructures
journal, April 2017

Cooperative singlet and triplet exciton transport in tetracene crystals visualized by ultrafast microscopy
journal, September 2015

Van der Waals heterostructures
journal, July 2013

Ultrafast Exciton Dissociation and Long-Lived Charge Separation in a Photovoltaic Pentacene–MoS ₂ van der Waals Heterojunction
journal, December 2016

Energy Transfer from Quantum Dots to Graphene and MoS ₂ : The Role of Absorption and Screening in Two-Dimensional Materials
journal, March 2016

Valley-polarized exciton dynamics in a 2D semiconductor heterostructure
journal, February 2016

Delocalization and dielectric screening of charge transfer states in organic photovoltaic cells
journal, February 2014

Picosecond energy transfer and multiexciton transfer outpaces Auger recombination in binary CdSe nanoplatelet solids
journal, March 2015

Epitaxial Growth of Molecular Crystals on van der Waals Substrates for High-Performance Organic Electronics
journal, January 2014

Twist-controlled resonant tunnelling in graphene/boron nitride/graphene heterostructures
journal, September 2014

Ultrafast charge transfer in atomically thin MoS2/WS2 heterostructures
journal, August 2014

Enhancement of photoresponsive electrical characteristics of multilayer MoS2 transistors using rubrene patches
journal, September 2014

Hot charge-transfer excitons set the time limit for charge separation at donor/acceptor interfaces in organic photovoltaics
journal, December 2012

Efficient charge generation by relaxed charge-transfer states at organic interfaces
journal, November 2013

Photoresponse of an Organic Semiconductor/Two-Dimensional Transition Metal Dichalcogenide Heterojunction
journal, April 2017

Efficient Charge Separation of Cold Charge-Transfer States in Organic Solar Cells Through Incoherent Hopping
journal, April 2017

Field-Effect Tunneling Transistor Based on Vertical Graphene Heterostructures
journal, February 2012

Nonradiative Energy Transfer from Individual CdSe/ZnS Quantum Dots to Single-Layer and Few-Layer Tin Disulfide
journal, April 2016

Electrical Transport Properties of Single-Layer WS ₂
journal, July 2014

Interfacial Charge Transfer Circumventing Momentum Mismatch at Two-Dimensional van der Waals Heterojunctions
journal, May 2017

Near-unity photoluminescence quantum yield in MoS2
journal, November 2015

Evolution of Electronic Structure in Atomically Thin Sheets of WS ₂ and WSe ₂
journal, December 2012

Highly efficient gate-tunable photocurrent generation in vertical heterostructures of layered materials
journal, October 2013

Stretched-exponential decay of the luminescence in porous silicon
journal, December 1993

Exciton dynamics and annihilation in WS ₂ 2D semiconductors
journal, January 2015

Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer ${WS}_{2}$
journal, August 2014

Coherent ultrafast charge transfer in an organic photovoltaic blend
journal, May 2014

Determination of band offsets, hybridization, and exciton binding in 2D semiconductor heterostructures
journal, February 2017

Interlayer orientation-dependent light absorption and emission in monolayer semiconductor stacks
journal, June 2015

Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures
journal, February 2015

Coherent ultrafast charge transfer in an organic photovoltaic blend
conference, January 2014

Visualizing excitations at buried heterojunctions in organic semiconductor blends
text, January 2017

Evolution of Electronic Structure in Atomically Thin Sheets of WS2 and WSe2
text, January 2012

Reduced dielectric screening and enhanced energy transfer in single and few-layer MoS2
text, January 2014

Electrical Transport Properties of Single-Layer WS2
text, January 2014

Twist-controlled resonant tunnelling in graphene-boron nitride-graphene heterostructures
text, January 2014

Mixed-Dimensional van der Waals Heterostructures
text, January 2016

Synthesis of Sulfur-Hybridized Pyracylene and the Unexpected Phenyl Shift Mediated Rearrangement of Scholl Reaction: Synthesis of Sulfur-Hybridized Pyracylene and the Unexpected Phenyl Shift Mediated Rearrangement of Scholl Reaction
journal, May 2019

A Facile and Effective Method for Patching Sulfur Vacancies of WS ₂ via Nitrogen Plasma Treatment
journal, June 2019

Long-range exciton transport and slow annihilation in two-dimensional hybrid perovskites
journal, January 2020

Molecular engineering of organic–inorganic hybrid perovskites quantum wells
journal, November 2019

Transient absorption microscopy: Technological innovations and applications in materials science and life science
journal, January 2020

Long-lived charge separation in two-dimensional ligand-perovskite heterostructures
journal, January 2020

Ultrafast measurements of the dynamics of single nanostructures: a review
journal, November 2018

Biexciton Auger Recombination Differs in Hybrid and Inorganic Halide Perovskite Quantum Dots
journal, December 2017